BHV-6697 and GF-6698: CheckboxItem and FormCheckbox replace images with icon font Enyo-DCO-1.1-Signed-off-by: Brooke Peterson <brooke.peterson@lge.com>
Switched from :before back to :after, Restored separate [disabled] and [checked] styles, Reworked the CSS into more readable LESS format.
Enyo-DCO-1.1-Signed-off-by: Blake Stephens <blake.stephens@lge.com>
Merge pull request #1292 from enyojs/BHV-6697-6698-brookepeterson

BHV-6697 and BHV-6698: CheckboxItem and FormCheckbox replace images with ...